One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,7)(5,6)(10,13)(14,15)(17,18,20,22)(19,23,24,21)(26,27)(28,32)(1,3)(2,7)(4,6)(5,8)(9,10)(11,15)(12,13)(14,16)(17,18)(19,23)(20,22)(21,24)(26,27)(30,31) involution — undirected(3,4)(7,8)(11,16)(14,15)(19,24)(21,23)(25,26,29,27)(28,30,32,31)(1,4,6,3)(2,7,5,8)(9,11,12,16)(10,14,13,15)(17,19)(18,21)(20,24)(22,23)(25,27,29,26)(28,31,32,30)(1,5,6,2)(3,8,4,7)(9,10)(11,15)(12,13)(14,16)(17,18)(19,23)(20,22)(21,24)(25,28,29,32)(26,30,27,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.